Example of designation of the SPJ coupling with the nominal torque of Mn=22000 Nm, hub hole diameters of d1=60 mm, d2=80 mm, hub hole lengths of l1=105 mm, l2=105 mm, size of 130:
22000-60/105-80/105-130 SPJ Single-sided gear coupling
Single-sided gear couplings are used in pairs with a spacer shaft.
In cases where journal misalignment is excluded, a single SPJ coupling may be used.